GeForce GTX 465 vs Radeon R9 390 8G

Intro

Compare all that to the Radeon R9 390 8G, which comes with core speeds of 1000 MHz on the GPU, and 1500 MHz on the 8192 MB of GDDR5 memory. It features 2560 SPUs along with 160 TAUs and 64 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 465		200 Watts
Radeon R9 390 8G		275 Watts
	Difference: 75 Watts (38%)

Memory Bandwidth

The Radeon R9 390 8G, in theory, should be quite a bit faster than the GeForce GTX 465 in general. (explain)

Radeon R9 390 8G		384000 MB/sec
GeForce GTX 465		102592 MB/sec
	Difference: 281408 (274%)

Texel Rate

The Radeon R9 390 8G is a lot (approximately 499%) better at anisotropic filtering than the GeForce GTX 465. (explain)

Radeon R9 390 8G		160000 Mtexels/sec
GeForce GTX 465		26708 Mtexels/sec
	Difference: 133292 (499%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon R9 390 8G is the winner, by a large margin. (explain)

Radeon R9 390 8G		64000 Mpixels/sec
GeForce GTX 465		19424 Mpixels/sec
	Difference: 44576 (229%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the largest amount of information (counted in megabytes per second) that can be moved past the external memory interface in a second. It's worked out by multiplying the interface width by its memory clock speed. If it uses DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This figure is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.